Lavender is a plant that requires a lot of sunshine to thrive. Therefore, it can be difficult to cultivate indoors. By taking some precautions, you can minimize the problems that lavender can have when grown inside. Indoor lavender plants need to be near a solid source of light, whether placed on a sunny windowsill or positioned beneath a grow light for several hours each day. For best results, move potted lavender plants indoors only during the harsh winter months.
Plant the lavender in a pot with a drainage hole in the base, as the herb's roots are very sensitive to over-watering. For best results, use good-quality potting soil that is designed to drain well.
Water indoor lavender plants infrequently. Check the soil daily; when it is dry and crumbly to the touch, water the plant until liquid runs out of the bottom of the pot. Allow it to dry out completely before watering again.
Place lavender plants in a warm, dry place that gets plenty of sunshine, such as a south-facing window.
Use a grow light to give lavender plants extra light if they cannot obtain enough natural light indoors. Place the plants under a lit grow light for at least 12 hours a day.
Feed the lavender plants with a water-soluble herb fertilizer once every two weeks or so. This will replenish the nutrients in the soil.
Move the lavender plant outside on balmy days and when spring arrives. It will thrive outdoors.